Inotify is a Linux kernel feature enabling user space programs to
monitor parts of the filesystem in a efficient way. libinotifytools
is a thin layer on top of the kernel interface which makes it easy
to set up watches on many files at once, read events without having
to deal with low-level I/O, and several utility functions for inotify-
related string formatting

/usr/share/doc/libinotifytools0/README

inotify-tools
=============
This is a package of some commandline utilities relating to inotify.
The general purpose of this package is to allow inotify's features to be used
from within shell scripts. Read the man pages for further details.